Abstract
The purpose of this study was to investigate the cell necrosis by the hysteric heating of Co1-xNixFe2O4 and Ba1-xSrxFe12O19 ferrites under external magnetic field with respect to applications in hyperthermic cancer treatments. Co1-xNixFe2O4 and Ba1-xSrxFe12O19 ferrites were synthesized by a sol-gel process. Variation of the temperature as a result of hysteresis heating was measured as a function of the exposure time to the external alternating magnetic field at frequencies of 0.1 - ~ 15 MHz. A human squamous cell carcinoma KB cell line was selected to determine the effect of the synthesized ferrites on the destruction of carcinoma cells in vitro using a methylthiazol tetrazolium bromide (MTT) method. When a CoFe2O 4 disc was placed in 0.2 ml of distilled water, the greatest temperature change (ΔT = 29.3°C) was observed. More than half of the malignant carcinoma cells were dead after being exposed to the 7-MHz ac magnetic field for 1 h by CoFe2O4 ferrites, while normal cells survived more than 60% of the time.
Original language | English (US) |
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Pages (from-to) | 2985-2987 |
Number of pages | 3 |
Journal | IEEE Transactions on Magnetics |
Volume | 40 |
Issue number | 4 II |
DOIs | |
State | Published - Jul 2004 |
Keywords
- Alternating magnetic field
- Carcinoma cell
- Hyper-thermia
- Hysteresis heating
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering